'use strict'
const path = require( 'path' )
const defaultSettings = require( './src/settings.js' )

function resolve( dir ) {
    return path.join( __dirname, dir )
}

const name = defaultSettings.title || 'Admin' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following method:
// port = 9527 npm run dev OR npm run dev --port = 9527
const port = process.env.port || process.env.npm_config_port || 8080 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
    /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
    publicPath: '/',
    outputDir: 'dist',
    assetsDir: 'static',
    lintOnSave: false,
    // lintOnSave: process.env.NODE_ENV === 'development',
    productionSourceMap: false,
    devServer: {
        port: port,
        open: true,
        overlay: {
            warnings: false,
            errors: true
        },
        //proxy
        proxy: {
            // change xxx-api/login => mock/login
            // detail: https://cli.vuejs.org/config/#devserver-proxy
            [ process.env.VUE_APP_BASE_API ]: {
                target: `http://www.b.com`,
                changeOrigin: true,
                pathRewrite: {
                    [ '^' + process.env.VUE_APP_BASE_API ]: ''
                }
            }
        },
        after: require('./mock/mock-server.js')
    },
    configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
        name: name,
        resolve: { 
            alias: { 
                '@': resolve( 'src' ),
                '@static' : resolve( 'static' ),
            } 
        }
    },
    chainWebpack( config ) {
        config.plugins.delete( 'preload' ) // TODO: need test
        config.plugins.delete( 'prefetch' ) // TODO: need test

        // set svg-sprite-loader
        config.module
            .rule( 'svg' )
            .exclude.add( resolve( 'src/icons' ) )
            .end()
        config.module
            .rule( 'icons' )
            .test( /\.svg$/ )
            .include.add( resolve( 'src/icons' ) )
            .end()
            .use( 'svg-sprite-loader' )
            .loader( 'svg-sprite-loader' )
            .options( { symbolId: 'icon-[name]' } )
            .end()

        // set preserveWhitespace
        config.module
            .rule( 'vue' )
            .use( 'vue-loader' )
            .loader( 'vue-loader' )
            .tap( options => {
                options.compilerOptions.preserveWhitespace = true
                return options
            } )
            .end()

        config
        // https://webpack.js.org/configuration/devtool/#development
            .when(
                process.env.NODE_ENV === 'development',
                config => config.devtool( 'cheap-source-map' )
            )

        config
            .when(
                process.env.NODE_ENV !== 'development',
                config => {
                    config
                        .plugin( 'ScriptExtHtmlWebpackPlugin' )
                        .after( 'html' )
                        .use( 'script-ext-html-webpack-plugin', [ {
                            // `runtime` must same as runtimeChunk name. default is `runtime`
                            inline: /runtime\..*\.js$/
                        } ] )
                        .end()
                    config
                        .optimization.splitChunks( {
                            chunks: 'all',
                            cacheGroups: {
                                libs: {
                                    name: 'chunk-libs',
                                    test: /[\\/]node_modules[\\/]/,
                                    priority: 10,
                                    chunks: 'initial' // only package third parties that are initially dependent
                                },
                                elementUI: {
                                    name: 'chunk-elementUI', // split elementUI into a single package
                                    priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                                    test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                                },
                                commons: {
                                    name: 'chunk-commons',
                                    test: resolve( 'src/components' ), // can customize your rules
                                    minChunks: 3, //  minimum common number
                                    priority: 5,
                                    reuseExistingChunk: true
                                }
                            }
                        } )
                    config.optimization.runtimeChunk( 'single' )
                }
            )
    }
}
